4-20
Cisco Nexus 2000 Series Hardware Installation Guide
Chapter4 Installing a Cisco Nexus Fabric Extender
Removing and Installing Components
Caution Be sure that the fan that you are installing has the same airflow direction as the other fans and power
supply modules in the same chassis. Either all of the modules must have port-side exhaust airflow (a blue
or no color on the front of the module) or all of the modules must have port-side intake airflow (red or
black color on the front of the module). If the modules have different airflow directions in the same
chassis, an error condition occurs, the switch can over heat, and the switch can shut down.
Note If you power up a FEX with power supply and fan modules that have different directions of airflow, an
error condition will occur and the switch can over heat and shut down. With this error condition, you
must shut down the switch to replace the modules that do not take in cool air from the cold aisle. After
you ensure that all of the modules have the same direction of airflow and take in cooling air from the
cold aisle, you can power up the FEX.
This section includes the following topics:
•Removing a Fan, page 4-20
•Installing a Fan, page4-20
Removing a Fan
Warning
When removing the fan tray, keep your hands and fingers away from the spinning fan blades. Let the
fan blades completely stop before you finish removing the fan tray.
Statement 258
To remove a fan, follow these steps:
Step1 Pinch the two protruding tabs of the fan towards each other to release the latch and pull the fan outward.
Step2 Pull the fan clear of the chassis and set it on an antistatic surface or repack it in packing materials.
Installing a Fan
To install a fan, follow these steps:
Step1 Place the fan into the port-side exhaust chassis cavity so it rests on the chassis, and then push the fan into
the chassis as far as it can go until it is latched in place.
Step2 Listen for the fan if the device is powered on. You should immediately hear it operating. If you do not
hear it, ensure that the fan is inserted completely in the chassis and the faceplate is flush with the outside
surface of the chassis.
Step3 Verify that the LED is green. If the LED is not green, the fan is faulty. If this problem occurs, contact
your customer service representative for a replacement part.